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High-blocking corrosion-resisting lithium battery composite packaging film and preparation method thereof

A composite packaging film and corrosion-resistant technology, which is applied in the field of lithium battery composite film and its preparation, can solve the problems of complex production process, broken thick aluminum foil, difficult operation, etc., achieve high safety, reduce the possibility of delamination, Lightweight effect

Inactive Publication Date: 2010-06-30
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Lithium-ion battery flexible packaging materials are an important part of lithium-ion batteries. At present, most of the flexible packaging materials used in the world are produced in Japan. The barrier layer generally needs to use extremely thick aluminum foil, and adopts 4 to 7 layers of structure. Composite materials, high cost, complex production process, difficult to operate, easy to break thick aluminum foil and other disadvantages

Method used

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  • High-blocking corrosion-resisting lithium battery composite packaging film and preparation method thereof
  • High-blocking corrosion-resisting lithium battery composite packaging film and preparation method thereof
  • High-blocking corrosion-resisting lithium battery composite packaging film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0050] a. Polyethylene terephthalate (PET) layer printing process: in the case of 20 ℃, the PET film is printed in color to form a PET film;

[0051] b. The preparation process of the composite polyethylene (PE) layer: each layer of polyethylene resin is placed in its own barrel according to the proportion, and after being extruded by an extruder, a composite polyethylene film is made:

[0052] The proportioning ratios of the present invention are all weight percent concentrations.

[0053] The specific ratio is:

[0054] Composite layer: 66% MDPE (2038.68G of Dow Chemical) + 34% LDPE (150BW of Exxon Mobil)

[0055] Core layer: 33% HDPE (F920A of Samsung Total) + 33% MDPE (2038.68G of Dow Chemical) + 34% LDPE (150BW of Exxon Mobil)

[0056] Seal layer: 50% MLLDPE (SP2520) + 25% MDPE (2038.68G of Dow Chemical) + 25% (150BW of ExxonMobil)

[0057] c. Dry compounding: compound the PET printing film (step 1), AL, NY, and ALPE (step 2) that have been printed with patterns and text...

Embodiment 2

[0061] remove

[0062] b. The preparation process of the composite polyethylene (PE) layer: each layer of polyethylene resin is placed in its own barrel according to the proportion, and after being extruded by an extruder, a composite polyethylene film is made:

[0063] The specific ratio is:

[0064] Composite layer: 50% MDPE (2038.68G of Dow Chemical) + 50% LDPE (150BW of Exxon Mobil)

[0065] Core layer: 25% HDPE (F920A of Samsung Total) + 37.5% MDPE (2038.68G of Dow Chemical) + 37.5% LDPE (150BW of Exxon Mobil)

[0066] Seal layer: 50% MLLDPE (SP2520) + 25% MDPE (2038.68G of Dow Chemical) + 25% (150BW of ExxonMobil)

[0067] c. Dry compounding: compound the PET printing film (step 1), AL, NY, AL, PE (step 2) with the printed pattern and text in sequence through the dry compounding machine in order of structure, and the glue used is NC285A ( Novaco Company), the operating concentration of the adhesive is controlled in No. 3 Zahn cup for 17-20 seconds, and the coating amo...

Embodiment 3

[0070] remove

[0071] b. In the preparation process of the composite polyethylene (PE) layer,

[0072] Composite layer: 66% MDPE (2038.68G of Dow Chemical)+33.0% LDPE (150BW of Exxon Mobil)+1.0% zirconium dioxide, and the rest are the same as in Example 1.

[0073] The main technical index of embodiment 1,2,3

[0074]

[0075] Wherein the water vapor transmission rate of embodiment 3 is 0g / m 2 48h, the oxygen transmission rate is 0cm 3 / m 2 ·48h·0.15Mpa.

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Abstract

The invention discloses a high-blocking corrosion-resisting lithium battery composite packaging film and a preparation method thereof; the composite packaging film sequentially comprises an outer layer, a middle layer and a heat-sealing layer from outwards to inwards, blocking layers are arranged between the outer layer and the middle layer and between the middle layer and the heat-sealing layer, and the blocking layer is aluminium foil with 7-15mum of thickness; the preparation method comprises the following steps: a. polyethylene terephthalate layer printing; b. composite polyethylene layer preparation; c. dry compound; d. slitting; compared with the prior art, all indexes are completely in accordance to the package standard of the lithium electronic battery, the safety performance is high, the sealing property, blocking performance and corrosion prevention performance are good, transportation and storage are easy, the volume is light, the usage is convenient, and the invention is suitable for the packing development tendency of current batteries.

Description

technical field [0001] The invention belongs to a composite packaging film and a preparation method thereof, in particular to a composite film for lithium batteries and a preparation method thereof. Background technique [0002] Lithium-ion batteries are the most promising and fastest-growing secondary batteries, which can be used in mobile phones, digital cameras, game consoles, electronic equipment, electric vehicles, space technology, and defense industries. In the next five years, the production scale of the world's lithium-ion battery industry is expected to maintain a steady growth of about 8%, and by 2010 it will reach a production scale of 3.25 billion. [0003] With the gradual shrinking of the nickel-cadmium battery market, the lithium-ion battery market will maintain rapid growth in the next few years, and its market potential will be even greater. Take mobile phone batteries as an example. According to statistics, the sales volume of mobile phones in 2007 was 72...

Claims

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Application Information

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IPC IPC(8): H01M2/02B65D65/40B65D85/88H01M50/121H01M50/126H01M50/145
CPCY02E60/12Y02E60/10
Inventor 江继忠鲍祖本潘健
Owner HUANGSHAN NOVEL
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